Projecting-machine.



H. S. GAY 6I EA W. DUKE.

PROIECTING MACHINE.

APPLICATION FILED Nov. I3. 1913.

1,182,556. Patented May 9, 1916.

2 SHEETS-SHEET I.

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H. S. GAY 6L E. W. DUKE.

PROJECTING MACHINE.

APPLICATIQN FILED Nov. 13, |913.

Patented May 9, 1916.

2 SHEETS-SHEET 2 UNITED STATES PATENT OFFICE.

HAROLD S. GAY AND ELZA W. DUKE, OF LOS ANGELES, CALIFORNIA, ASSIGNORS TO STEREO ANNUNCIATOR CO., OF LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

PROJ ECTING-MACHINE Application filed November 13, 1913.

To all whom it may concern Be it known that we, HAROLD S. GAY and ELZA W. DUKE, citizens of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Projecting-Machines, of which the following is a specification.

This invention relates to devices of the kind shown and described in our former application for Letters Patent of the United States for improvements in devices for producing images, filed April 16, 1913, Ser. No. 761,629.

An object of this invention in common with an object of said former invention is the projection at intervals of time of images on a screen, such intervals being of appreciable extent so that the images will not seemingly blend with one another as in inotion picture machines.

In said former invention provision was made for automatically cutting the lamp in and out of the electric circuit as the slide carrier or drum was alternately stationaryY and revolving; and in said invention an electromagnet was cut in and out of an eleitric circuit simultaneously with the cutting in and out of the lamp, said electromagnet being designed, to release and turn the drum when the electi'omagnet was energized. It will be clear from this that in said former invention we employed an electromagnet and switches to control the same and to control the lamp.

An object of this invention is to mechanically control the successive exposures and to greatly simplify the apparatus and make the operation of the same more positive and dependa-ble and to minimize liability of the same getting out of order, the action being wholly automatic without relying upon make and break contacts.

In said former invention an arm connected the oscillatory motor to a finger designed to engage a notched wheel, said arm being operated by the electromagnet hereinbefore mentioned; and we also utilize the arm in this invention to connect the motor and finger; but in contradistinction to said former invention this present device is provided with a cam to throw the motor into and out of commission and simultaneously to throw the finger out of and into commission.

Specification of Letters Patent.

Patented May 9, 1916.

Serial No. 801,276.

Instead of cutting the lamp in and out of an electric circuit as in said former invention to alternately effect illumination and non-i llumination of' the screen, a shutter is provided in this invention, provision being made for automatically operating said shutter to cut off the rays of light when theI motor is in commission and the drum is re volying and to allow the rays of light to be emitted from the machine when the motor is o ut of commission and the drinn is stationary.

Another object of this invention is to produce a device of this character which is simple and which is inexpensive to make and operate so that when the same is installed it will work continuously when the electric current is turned on and will require little, if any, attention. Other objects and advantages may appear 1n the subjoined detail description and drawings filed herewith.

. The accompanying drawings illustrate the invention.

Figure 1 is an elevation of the machine with film in place looking at the driving side, a portion of the drum being broken away to expose to view the shutter and its operating mechanism, and the greater portion of the hood being omitted for clearness of illustration. Fig. 2 is a plan view of Fig. 1, a portion of the drum being broken away for clearness of illustration. .Fig 3 is an enlarged elevation of some of the parts in Fig. 1. Fig. 4 is a fragmentary rear elevation partly in section on irregular line indicated by m-4, Fig. 3.

The film a containing the images to be projected on the screen, not shown, may be a continuous film such as is well-known in the moving picture art or may be in the form of separate slides such as used in stere* opticans and, in this instance, such slides are detachably held by flanges 1 against orificed plates 2 arranged in succession and forming the periphery of a slide carrier or drum 3 which is provided axially with a shaft 4 journaled at 5 by a ball bearing or the like to a standard 6.

The shaft 4 is provided with a notched wheel 7, the notches 8 of which are designed to be engaged by a tooth in the form of a roller 9 that is mounted on a finger 1.0 pioted at 11 to a bracket 12 of the standar 6.

The notches 8 correspond in number and in spacing by degrees of angular measurement with the plates 2, vand the tooth 9-is so positioned as to successively engage the notches 8 when the corresponding plates are substantially opposite the lens holder 13, so that the film through which the light rays are transmitted from the lamp 14 will be held stationary for an interval of time corresponding to the lengt-h of time that the tooth 9 engages the appropriate notch 8.

The finger 10 is mechanically operated to alternately engage and disengage the wheel 7 and for this purpose said finger is pivoted at 15 to an arm 16 which extends downward and is loosely connected by pins or bolts 17 between the upper and lower limbs of a loop 18 bent up from the outer end of a bracket 19 that is fastened by' a screw 20 or the like to a motor 21 which is pivotally hung at 22 to a bracket 23 of the standard 6. so that the mot-or can oscillrate in a vertical plane.

The motor 21 is provided with and is designed to turn a. horizontal worm 24 continuously in mesh with a worm gear 25 which turns a vertical worm 26 that meshes with a Worm gear 21 provided with a caln tooth in the form of a roller 28' designed to engage a cam or shoulder 29 connected to the bracket 23.

The worm gears 27 and worin 26 are all mounted on the bracket 19 so as to oseillate with the motor 21 when the tooth 28 engages the cam 29 as the worm gear 27 is revolved by the power transmitted to it from the motor 21. r

The tooth 28 and shoulder 29 thus constitute a cam device and when said cam device is in commission to swing the driving end of the motor 21 upward, the Worm 24 is designed to directlyand positively turn a train of gears 30, 31, 32, 33 and 34, said gear 34 being mounted on and adapted to turn the shaft 4, thus to invariably turn the drum 3.

The arm 16 is suiliciently long towthrow the tooth 9 out of commission when the worm 24 is in commission to turn the gear 30, and vice versa to throw the worm 24 out of engagement with gear 3Q when the tooth 9 is in commission and engages the appropriate notch 8. y p i It is now clear from the foregoing that so long as the motor 21 is continuously driven, the cam dev ice will operate to tilt the motor and alternately throw the worm 24 into commission to revolve the drum 3 and permit gravity to throw the tooth 9 yintoV commission to hold the drum stationary. y

The speed at which the drum 3 is revolved is dependent upon the speedof the motor 21 and ratios of the worm 24 and gears 30', 3 1, 32, 33 and 34; and the ratea't whichthe plates 2 are advanced to projecting position is governed by the speed of the motor and ratios of the worms 24, 26 and' worm gears 25, 27. ,a

The speed of the motor 21 may be suitably governed by a rheostat 35.

In our hereinbefore mentioned invention rays of light for projecting the images were produced only at intervals. the lamp being cut in and out of the electric circuit by a suitable switch. In this invention the rays oi' light emitted continuously from the constantly burning lamp 14 toward the lens holder 13 are interrupted at the lens holder at intervals by a vibrating shutter 36 which is fixed to a lever 37 having a counterbalance 38 pivoted ecce-ntricallv at 39 to the upturned end of a laterally bent arm 40 of a post 41.

Provision is made for automatically actuating the shutter 36 and its lever 37, and for this purpose the drum 3 is provided with equidistant teeth 42 preferably bent from the plate 2 and designed to engage and depress the forward end of the shutter lever to raise the shutter as in Fig. 1.

The layer 37 and teethV 42 are so arranged that the shutter 36 does not begin its opening movement until the appropriate plate 2 is nearly in its projecting position and are so arranged that the teeth 42 are in commission to hold the shutter at substantially its maximum raised position when the tooth 9 engages the appropriate notch 8 of the wheel 7, so that in practical operation of the ma- Chine the film (L will be substantially stationary during the periods of exposure and so that the shutter will be quickly operated at the beginning and end of such periods.

Provision is made to prevent the shutter 3b' from falling below the closed position indicated in broken lines, Fig. 1, and for this purpose a stop 43 is designed to engage and support the lever 37, said stop being at the inbent end of an arm 44 of the post 41.

The standard 6 and the post 41 may be mounted on a suitable base 45 provided with a hood 46 of any desired construction, as shown for instance in our hereinbefore mentionedA invention, and which is understood without being fully shown and described in detail in connection with this invention.

In practical operation of the machine the lm r1- will be placed around the drum 3 and electric current will he supplied to the lamp 14 and motor 21. Considering at' the start that the parts are in the positions shown in the drawings, the `operation of the motor 21 causes theroller to ride up the cam 29` see Fig. 4. thus unlatching the wheel 7 and simulta neously raising the worm 24 into mesh withv the gear 30 thereby driving the drum 3 forward in the` direction of the feathered arrow thereon, and moving the teeth 42 so as to release the lever 37 and allow the shutter 36 to close. Vhen the worm gear 27 has revolved suflcientlv to cause the roller 28 to ride over the tip of the cam 29 and the wheel T has revolved to bring the neXt succeeding notch 8 adjacent the tooth 9, the tooth 9 will naturally drop into said siicceeding notch, thus throwing the Worm 24 out of engagement with the gear 30 and instantly stopping the wheel T and the drum 3. During this progression ot the wheel T from one notch to the next, a plate 2 will be turned out ot' its image projecting position and a succeeding plate will be turned into its image projecting position. The latter part ot' this movement causes the appiopriate tooth l2 to open the shutter 3G thereby allowing rays ot' light trom the lamp it to pass through the lens holder 13 and to be emitted troni the machine so as to project the appropriate image lying in the path of said rays onto the screen. not shown. After an interval ot' time determined by the length of the time required tor the worm gear 27 to make approximately one revolution the roller 28 will again ride up the cam 29 to cause repetition ot the operations just described and automatically cause another eX- posure. As long as electric current is supplied to the motor 2l the roller 28 at every revolution ot' the worm gear 27 will engage the cam 29 so as to cause alternate opening and closing ot' the shutter 3G and intermittent motion ot' the drinn 3 so as to successively expose the different portions of the film fz as said portions come opposite the lens holder and lamp 13, 14.

le claim:

l. projecting machine comprising a rotatably mounted drum, a Wheel designed to turn the` drum and provided with notches, a tooth to engage said notches successively. a pivotally mounted motor provided with a worm. cam means operating with said Worm, gearing to turn the wheel. and means connecting the motor to the tooth and operatalile by the ivorm and cam means to move the tooth out ot' engagement with the notches and to move the worm into mesh with said gearing.

Q. A projecting machine comprising a rotatably mounted drum` a wheel designed to turn the drinn and provided with notches. a tooth to engage said notches successively.r a pivotally mounted motor provided With a worm. gearing to turn the Wheel, a bracket connected to the motor. means connecting the bracket to the tooth. a gear Wheel mounted on the bracket and operatably connected to the worm. a shoulder. and a tooth on the gear wheel designed to engage said shoulder to move said worm into mesh With the gearing and to simultaneously move the notch engaging tooth out ot commission.

3. A projecting machine comprising a standard. a shaft journaled to the standard. a drum on said shaft. a Wheel on said shaft and provided with notches. a finger pivoted to the standard and provided with a tooth designed to engage the notches successively. a pivotally mounted motor` a worm connected to and operated by the motor, a bracket fastened to said motor, an arm pivoted to and connecting the bracket and iinger, gearing to turn the shaft, a gear Wheel mounted on the bracket and operable by the ivorni. a tooth on said gear Wheel, and a shoulder designed to be engaged at intervals by said gear wheel tooth when the gear Wheel revolves.

4. A projecting machine comprising a drum. a wheel designed to turn said dium` means to hold the wheel against turning, means to release said wheel holding means, and means connected to and adapted to op erate the releasing means to turn said wheel when so released.

5. A projecting machine comprising a drum adapted to revolve teeth on the drum, a Wheel designed to revolve said drinnr` means to hold the Wheel against turning, means to release said Wheel holding means, means to turn said Wheel when so released. a shutter. and mechanism operable by teeth on the revolving drinn to operate the shutter.

6. A projecting machine comprising a drinn adapted to revolve, teeth on the drum, a Wheel designed to revolve said drum, means to hold the Wheel against turning, means to release said Wheel holding means, means to turn said Wheel when so released, a shutter. and mechanism operable by teeth on the revolving drum to open the shutter, said teeth adapted to engage the mechanism and holding the shutter open when the ivheel is stationary.

7. projecting machine comprising a rotatably mounted drum, teeth on the drinn, a lens holder adjacent the periphery of the drinn. means to turn the drum, a shutter at the lens holder, and means alternately being engaged and disengaged by the teeth to operate theeshutter.

8. A projecting machine comprising a rotatably mounted drum, a lens holder adjacentthe periphery of the drinn, teeth on the drum, means to intermittently turn the drum. a shutter at the lens holder, and mechanism operatable by turning of the drum and engaging the teeth to open the shutter.

9. A projecting machine comprising a rotatably mounted drinn, teeth on the drum, a lens holder adjacent the periphery of the drum. means to turn the drinn, means to hold the drinn against turning, a shutterl at the lens holder. and means engaged by the tccth to hold the shutter open when the drum is stationary.

10. A projecting machine comprising a rotatably mounted drum. a lens holder adjacent the periphery ot the drinn, means to turn the drum, a shutter at the lens holder,

a lever t0 operate the shutter. and means on the drum to engage and move said lever.

11. A projecting machine comprising a rotatably mounted drum. a lens holder adjacent the periphery of the drum, means to turn the drum. means to hold the drum against turning, a gravity closed shutter at the lens holder. a lever to open the shutter. and means on the drum to engage and hold the lever when the shutter is open and the drum is stationary.

12. A projecting machine comprising a rotatably mounted drum, a lens holder adjacent the periphery of the drum, means to turn the drum. a shutter at the lens holder. a lever to operate the shutter. and teeth on the drum to engage and more said lever.

13. A projecting machine comprising a rotatably mounted drum, a lens holder adjacent the periphery of the drum, means to turn the drum. a shutter at the lens holder. a lever to operate the shutter. a counterbalance on and tending to tilt the lever, and teeth on the drum to engage and tilt said lever.

1l. A projecting machine comprising a rotatably mounted drum, a lens holder adjacent the periphery of the drum, means to turn the drum. a tooth on the drum, and a shutter designed to be operated by said tooth as the drinn turns.

In testimony whereof, We have hereunto set our hands at Los Angeles, California, this 5th day of November. 1913.

HAROLD S. GAY. ELZA W. DUKE.

ln presence of# JAMES R. ToWNsENn. (urEoRGE H. HILEs.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner ot Patents, Washington, D. G. 

